/* roulang page: index */
:root {
      --primary: #00D084;
      --primary-dark: #059669;
      --secondary: #0F172A;
      --accent: #2563EB;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --bg-light: #F8FAFC;
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", sans-serif;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
    }
    .hover-shadow:hover {
      box-shadow: 0 20px 25px -5px rgba(0, 208, 132, 0.15);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
    }
    .accordion-item.active .accordion-content {
      max-height: 200px;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }